In The Different Tectonic Units Of The Southwest Sanjiang Metallogenic Belt Correlation Between Tectonics And Ore Deposits(Points) And Delineation Of Metallogenic Distant Areas

The "Sanjiang" area is the Tethyan metallogenic domain refers to the Nu River,Lancang River and Jinsha River three rivers and streams of the Hengduan Mountains region,western Yunnan,Sichuan,Tibet cross and green Hainan,including the eastern Tibetan Plateau and Yunnan Guizhou Plateau in the west,the metallogenic conditions is superior,is China's most important copper,zinc,gold,silver etc.metallogenic belt.Based on the collection and collation of the study area on the data entry,screening and analyzing the data by GIS software,analysis of application of different methods,the different tectonic units in the deposits(points)respectively with the correlation analysis,find out the relationship between the distribution and their spatial distribution in the space in order to summarize the law,regional distribution the delineated metallogeneticprospective provinces.The main achievements of this paper are as follows:(1)Collect and sort out the multi-source data of fracture structures in the study area,and divide the structure into 4 grades according to the principle of structural classification,and do some verification work in the field.On this basis,the density characteristics and spatial characteristics of the structure in the study area are analyzed.(2)In the study area of various types of deposits(points)of multi-source data collecting and processing data,to study 884 deposit area(point)information are classified and summarized,classified according to their size,for each tectonic unit in the occurrence statistics,analysis of each tectonic unit deposits(points)the distribution and density characteristics.(3)Through correlation index calculation formula,the correlation index between structure and ore deposit(point)in 13 tectonic units is calculated,and the optimum buffer area in each tectonic unit is obtained by comparing the index size.Spatial density characteristics were analyzed by establishing density map.(4)On the basis of the establishment of the optimal buffer area,a comprehensive analysis of the abnormal areas of the study area is made by applying the multiple analysis methods of the relationship between the structure and the ore deposits(points).Mainly include: different tectonic units of different structure and size of ore deposits(points)related index calculation,structural complexity,access structure node density,structure,density,structure orientation interpolation results etc.The characteristics of the distribution in the space are analyzed,and the distribution law in the study area is summarized,and the abnormal regions of each analysis method are calculated.According to the correlation index,the weight is superimposed,and the prospective area of mineralization is delineated.Based on the above research results,we can get a clear correlation between the fracture and the mineral deposits(points)in the space.In different structural units,rather than the entire Sanjiang region,the narrowing of the scope of this paper can make more detailed description of the Sanjiang area of ore deposits(points)and tectonic metallogenic area between,to study regional forecast more accurately,the ore forming regularity of Southwest Sanjiang region is also a supplement to,want to southwest Sanjiang prospecting has certain guiding significance.